I really really love this Sonicare toothbrush--but not because it whitened my teeth. The number one reason I bought this toothbrush was for better plaque control, and when it comes to plaque control and superior oral hygiene, this product delivers. I never really noticed that it made my teeth any whiter. I do not have very dark teeth to begin with so I am not really surprised that I never noticed ...read morea difference. I suspect the darker your teeth the more likely you would be to notice a difference. If your only wanting whiter teeth, go for a bleaching product. If your wanting to really improve plaque control and improve your overall oral health, Sonicare is the way to go.— 2 years, 7 months ago